PubMed Journal Database | Journal of drug targeting RSS

08:11 EDT 29th May 2015 | BioPortfolio

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Showing PubMed Articles 1–25 of 154 from Journal of drug targeting

1243582

Studies on a new potential dopaminergic agent: in vitro BBB permeability, in vivo behavioural effects and molecular docking evaluation.

2-Amino-N-[2-(3,4-dihydroxy-phenyl)-ethyl]-3-phenyl-propionamide (DA-PHEN) has been previously synthesized to obtain a potential prodrug capable of release dopamine (DA) into CNS. However, DA-PHEN could act per se as a dopaminergic drug. In this study, the permeability transport (Pe), obtained by parallel artificial permeability assay (PAMPA), indicated a low passive transcellular transport (Pe = 0.32 ± 0.01 × 10(-6 )cm/s). Using the Caco-2 cell system, the Papp AP-BL in absorptive direction...

Wednesday 30th March 1233

Multivalent targeting of AT1 receptors with angiotensin II-functionalized nanoparticles.

The angiotensin II receptor type 1 (AT1R) is a G protein-coupled receptor of paramount significance since it is overexpressed in a number of diseased tissues that are highly attractive for nanoparticle targeting. However, it is also expressed at physiological levels in healthy tissue. Multivalent interactions mediated by multiple AT1R-binding moieties per nanoparticle could promote a high binding avidity to AT1R overexpressing cells and concomitantly spare off-target tissue. To investigate the feasibility o...

Tuesday 29th March 1233

The human Nox4: gene, structure, physiological function and pathological significance.

Increased generation of reactive oxygen species (ROS) has been implicated in the pathogenesis of a variety of diseases such as cardiovascular diseases and cancer. NADPH oxidase (Nox), a multicomponent enzyme, has been identified as one of the key sources of ROS. Nox4, one of the seven members of Nox family (Nox1, Nox2, Nox3, Nox4, Nox5, Duox1 and Duox2), has been extensively investigated in recent years. Its unique structures result in the constitutive generation of hydrogen peroxide (H2O2) as the main prod...

Monday 28th March 1233

Evaluation of a metalloporphyrin (THPPMnCl) for necrosis-affinity in rat models of necrosis.

The combination of an (13I)I-labeled necrosis-targeting agent (NTA) with a vascular disrupting agent is a novel and potentially powerful technique for tumor necrosis treatment (TNT). The purpose of this study was to evaluate a NTA candidate, THPPMnCl, using (131)I isotope for tracing its biodistribution and necrosis affinity. (131)I-THPPMnCl was intravenously injected in rat models with liver, muscle, and tumor necrosis and myocardial infarction (MI), followed by investigations with macroscopic autoradiogra...

Sunday 27th March 1233

Paediatric drug development of ramipril: reformulation, in vitro and in vivo evaluation.

Ramipril is used mainly for the treatment of hypertension and to reduce incidence of fatality following heart attacks in patients who develop indications of congestive heart failure. In the paediatric population, it is used most commonly for the treatment of heart failure, hypertension in type 1 diabetes and diabetic nephropathy. Due to the lack of a suitable liquid formulation, the current study evaluates the development of a range of oral liquid formulations of ramipril along with their in vitro and in vi...

Saturday 26th March 1233

Aptamers: new arrows to target dendritic cells.

Aptamers, as a novel class of molecular probes for diagnosis, imaging and targeting therapy, have attracted increasing attention in recent years. Aptamers are generated from libraries of single-stranded nucleic acids against different molecules via the "systematic evolution of ligands by exponential enrichment" (SELEX) method. SELEX is a repetitive process of a sequential selection procedure in which a DNA or RNA library pool is incubated separately with target and control molecules to select specific oligo...

Monday 22nd February 1210

Co-delivery of doxorubicin and siRNA for glioma therapy by a brain targeting system: angiopep-2-modified poly(lactic-co-glycolic acid) nanoparticles.

It is very challenging to treat brain cancer because of the blood-brain barrier (BBB) restricting therapeutic drug or gene to access the brain. In this research project, angiopep-2 (ANG) was used as a brain-targeted peptide for preparing multifunctional ANG-modified poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs), which encapsulated both doxorubicin (DOX) and epidermal growth factor receptor (EGFR) siRNA, designated as ANG/PLGA/DOX/siRNA. This system could efficiently deliver DOX and siRNA into U87...

1203679

Improvement of anti-tumor abilities on human non-small cell lung carcinoma by micellization and cross-linking of N-(2-hydroxypropyl) methacrylamide copolymers.

Non-small cell lung carcinoma is one of the most frequently occurred cancers with a very high rate of recurrence. Self-assembly N-(2-hydroxypropyl) methacrylamide (HPMA) micelles and cross-linked micelles were developed to improve antitumor ability of linear HPMA copolymer. The characters of HPMA micelles were investigated and compared using human non-small cell lung carcinoma 3-D culture model and nude mice xenograft model. Cross-linked micelles showed highest cytotoxicity on A549 cell monolayers after a s...

1183876

Effective photothermal chemotherapy with docetaxel-loaded gold nanospheres in advanced prostate cancer.

Abstract Background: Multifunctional gold nanospheres (MGNs)-loaded with docetaxel (MGN@DTX) were prepared and evaluated for therapeutic efficacy in nude mice bearing human prostate cancer xenografts. Methods: MGNs were prepared from PEGylated hollow gold nanospheres (HGNs) coated with folic acid and DTPTT chelate. Then, the effect of radiolabelled MGNs ((99m)Tc-MGNs) on PC-3 cell apoptosis was assessed by flow cytometry, while their binding affinity to these cells was evaluated by cell binding assays. Next...

1183875

Polybutylcyanoacrylate nanocarriers as promising targeted drug delivery systems.

Abstract Among the materials for preparing the polymeric nanocarriers, poly(n-butylcyanoacrylate) (PBCA), a polymer with medium length alkyl side chain, is of lower toxicity and proper degradation time. Therefore, PBCA has recently been regarded as a kind of widely used, biocompatible, biodegradable, low-toxic drug carrier. This review highlights the use of PBCA-based nanocarriers (PBCA-NCs) as targeting drug delivery systems and presents the methods of preparation, the surface modification and the advantag...

1183874

Aprotinin revisited: formulation, characterization, biodistribution and therapeutic potential of new aprotinin microemulsion in acute pancreatitis.

Abstract The aim of this study was to develop aprotinin-loaded microemulsion (MA) for intravenous administration and evaluate the biodistribution and therapeutic potential of developed formulation in acute pancreatitis models in rats. Phase diagrams were constructed to identify microemulsion region and the optimal microemulsion was evaluated for physicochemical properties and treatment effect in rats, and comparisons made with the solution of aprotinin (SA). To evaluate the biodistribution of the drug by ga...

1178523

Involvement of miR-133a and miR-326 in ADM resistance of HepG2 through modulating expression of ABCC1.

Abstract Recent studies have shown that a class of small, functional RNAs, named microRNAs, may regulate multidrug resistance-associated protein 1 (ABCC1). Since ABCC1 is an important efflux transporter responsible for cellular drug disposition, the discovery of microRNAs (miRNA) brings an idea that there may be some other unknown multidrug resistance (MDR) mechanisms exist. Using computational programs, we predicted that the 3'untranslated region (3'UTR) of ABCC1 contains a potential miRNA binding site for...

1102415

Microencapsulation of therapeutic bispecific antibodies producing cells: immunotherapeutic organoids for cancer management.

Abstract Regardless of the important therapeutic advances developed over the last years for the management of cancer, the fact is that many patients still suffer from a tremendous reduction on their quality of life due to lack of complete selectivity of conventionally administered chemotherapeutic drugs. In the search of more efficacious tumor-targeted therapies, the use of bispecific antibodies (bsAbs) capable of simultaneous binding to tumor-associated antigens and to an activating receptor, such as CD3, ...

1100708

Experimental evaluation of radioiodinated sennoside B as a necrosis-avid tracer agent.

Abstract Necrosis-avid agents are a class of compounds that selectively accumulate in the necrotic tissues after systemic administration, which can be used for in vivo necrosis imaging and targeted therapies. In order to search for a necrosis-avid tracer agent with improved drugability, we labelled iodine-131 on sennoside B (SB) as a naturally occurring median dianthrone compound. The necrosis targetability and clearance properties of (131)I-SB were evaluated in model rats with liver and muscle necrosis. On...

1082593

Sesamol-loaded solid lipid nanoparticles for treatment of skin cancer.

Abstract Role of reactive oxygen species (ROS) in skin carcinogenesis is well documented. Natural molecules, like sesamol, with marked antioxidant potential can be useful in combating skin cancers. In vitro antiproliferative (using MTT assay) and DNA fragmentation studies in HL 60 cell lines, confirmed the apoptotic nature of sesamol. However, it showed a significant flux across the mice skin upon topical application, such that its local availability in skin is limited. Former is attributed mainly to its pr...

1082592

Targeting delivery of liposomes with conjugated p-aminophenyl-α-d-manno-pyranoside and apolipoprotein E for inhibiting neuronal degeneration insulted with β-amyloid peptide.

Abstract Liposomes with conjugated p-aminophenyl-α-d-manno-pyranoside (APMP) and apolipoprotein E (ApoE) (APMP-ApoE-liposomes) were employed to carry neuron growth factor (NGF) across the blood-brain barrier (BBB) and enhance the survival of degenerated neurons. APMP-ApoE-liposomes were used to deliver NGF across a monolayer of human brain-microvascular endothelial cells (HBMECs) regulated by human astrocytes (HAs) for rescuing SK-N-MC cells from an insult of β-amyloid peptide 1-42 (Aβ1-42). An increase ...

1082591

Polymeric nanofibers: targeted gastro-retentive drug delivery systems.

Abstract Background: Conventional oral dosage forms exhibit poor/low bioavailability due to incomplete release of drug and short residence time at the absorption site. Gastro-retentive drug delivery system (GRDDS) is particularly used to improve bioavailability of the drugs, which have narrow absorption window down in the levels of gastrointestinal tract and also to treat local disorders. Purpose: The purpose of this review is to describe the utility of the nanofibers as gastro-retentive dosage form. From l...

Friday 20th July 1071

Interaction of polyethylene glycol (PEG) with the membrane-binding domains following spinal cord injury (SCI): introduction of a mechanism for SCI repair.

Abstract Lipid-binding domains regulate positioning of the membrane proteins via specific interactions with phospholipid's head groups. Spinal cord injury (SCI) diminishes the integrity of neural fiber membranes at nanoscopic level. In cases that the ruptured zone size is beyond the natural resealing ability, there is a need for reinforcing factors such as polymers (e.g. Polyethylene glycol) to patch the dismantled axoplasm. Certain conserved sequential and structural patterns of interacting residues specif...

1064884

The critical role of bisphosphonates to target bone cancer metastasis: an overview.

Abstract Cancer becomes the leading cause of deaths worldwide, including breast cancer, prostate cancer and lung cancer that preferentially metastasize to bone and bone marrow. Bisphosphonates (BPs) have been used successfully for many years to reduce the skeletal complications related with the benign and malignant bone diseases that are characterized by enhanced osteoclastic bone resorption. Nitrogen-containing bisphosphonates (N-BPs) have also been demonstrated to exhibit direct anti-tumour effects. BPs b...

1064883

The use of ultrasound to release chemotherapeutic drugs from micelles and liposomes.

Abstract Several drug delivery systems have been investigated to reduce the side effects of chemotherapy by encapsulating the therapeutic agent in a nanosized carrier until it reaches the tumor site. Many of these particles are designed to be responsive to the mechanical and thermal perturbations delivered by ultrasound. Once the nanoparticle reaches the desired location, ultrasound is applied to release the chemotherapy drug only in the vicinity of the targeted (cancer) site, thus avoiding any detrimental ...

Tuesday 9th September 1044

Aerosol delivery of programmed cell death protein 4 using polysorbitol-based gene delivery system for lung cancer therapy.

Abstract The development of a safe and effective gene delivery system is the most challenging obstacle to the broad application of gene therapy in the clinic. In this study, we report the development of a polysorbitol-based gene delivery system as an alternative gene carrier for lung cancer therapy. The copolymer was prepared by a Michael addition reaction between sorbitol diacrylate (SD) and spermine (SPE); the SD-SPE copolymer effectively condenses with DNA on the nanoscale and protects it from nucleases....

1038537

Thermosensitive poly-(d,l-lactide-co-glycolide)-block-poly(ethylene glycol)-block-poly-(d,l-lactide-co-glycolide) hydrogels for multi-drug delivery.

Abstract A current treatment strategy for peritoneal ovarian cancer is a combination of peritoneal surgery and multi-drug-based chemotherapy that often involves intraperitoneal (IP) injection. A thermosensitive poly-(d,l-lactide-co-glycolide)-block-poly(ethylene glycol)-block-poly-(d,l-lactide-co-glycolide) (PLGA-b-PEG-b-PLGA) hydrogel platform (thermogels) enabled gel loading of poorly work-soluble paclitaxel (cytotoxic agent), 17-allylamino-17-demethoxygeldanamycin (17-AAG, heat shock protein inhibitor), ...

1038536

In vitro and in vivo anti-cancer effects of targeting and photothermal sensitive solid lipid nanoparticles.

Abstract This report focuses on the in vitro and in vivo anti-cancer effects evaluation of targeting and photothermal sensitive solid lipid nanoparticles (SLN) for the co-loading of docetaxel (DTX), oxidized single-walled carbon nanotubes (OSWNT) and folic acid (FA). Compared with free DTX, FA-DTX-OSWNT-SLN could efficiently cross cell membranes and afford higher antitumor efficacy on the human hepatic carcinoma cell line (SMMC-7721) in vitro. Annexin V-FITC/PI double staining further confirmed that FA-DTX-...

1038535

Insights into drug delivery across the nail plate barrier.

Abstract Topical therapy is at the forefront in treating nail ailments (especially onychomycosis and nail psoriasis) due to its local effects, which circumvents systemic adverse events, improves patient compliance and reduces treatment cost. However, the success of topical therapy has been hindered due to poor penetration of topical therapeutics across densely keratinized nail plate barrier. For effective topical therapy across nail plate, ungual drug permeation must be enhanced. Present review is designed ...

1038534

Self-assembled polymeric nanoparticle of PEGylated chitosan-ceramide conjugate for systemic delivery of paclitaxel.

Abstract Chitosan has been widely explored as one of the most favorable biomaterials for various pharmaceutical applications due to its biodegradability and biocompatibility. Here, we report novel PEGylated-chitosan-ceramide (PEG-CS-CE) that forms stable polymeric nanoparticles capable of functioning as efficient carriers of hydrophobic drug molecules. The chitosan-ceramide conjugate (CS-CE) was linked with amine-polyethyleneglycol (NH2-PEG2000) by using dicyclohexylcarbodiimide/N-hydroxysuccinimide (DCC-NH...


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